updates and version numbers

[Chad M Stewart]

If this is covered in an FAQ I apologize, my quick check did not find 
it.  I'm new to FreeBSD and am wondering about version numbers of 
programs in FreeBSD vs. the programs general version.

Take sshd for example.  I started with 4.9-stable and then updated the 
system using cvsup in what I believe is the correct manner.   After all 
that I am left with

sshd version OpenSSH_3.5p1 FreeBSD-20030924

I'm confused on how to correlate this version to say 
ftp://ftp.ca.openbsd.org/pub/OpenBSD/OpenSSH/portable/ChangeLog

If I understand the way FreeBSD releases occur then using -stable I 
would not expect to have the latest and greatest software, rather I 
have a more "stable" version.  Appears that the latest and greatest 
portable version of OpenSSH is Release 3.7.1p2.  I am trying to figure 
out two things:

o - what is the base version of OpenSSH that 4.9-stable started with?  
Logic says that is 3.5p1, but I want to make sure I'm not missing some 
detail.

o - What patches have been applied to the base software to integrate 
with FreeBSD and more specifically security related patches?

Again I apologize if these are newbie questions that are answered 
somewhere in an FAQ.  In which case feel free to send me a URL.   I 
picked sshd as that is one service that I will be exposing and I want 
to make sure that I understand all of this and am not exposing a 
vulnerable version.

Regards,
Chad